Gumming machine



1,661,353 W. G. ZEPF GUMMING MACHINE Filed March 5, 1927 5 Sheets-Sheet 1 March 6, 1928.

March 6, 1928. 1,661,353

w. G. ZEPF GUMMING MACHINE Filed March 5. 1927 3 Sheets-Sheet 2 'V27 g f 2.4 l 31- 22 Patented Mar. 6, 1928.

UNITED STA-TES PATENT OFFICE.

. WILLIAM G. znrnor frigor, NEW YOILII, AssIGNoR To WHITEIIURST PRINTING AND BINDING COMPANY, OF TROY, NEW Yoan, A CORPORATION or NEW lYORK.l

' GUMMING MACHINE.

`Application led March 5, 1927. Serial No. 173,013.

Reference may be had to the accompanying drawings, and the reference characters marked thereon, Which form a part of this speciiication. Similar characters refei` to similar parts in the several figures therein.

The principal Object of the invention is to facilitate the application to sheets of paper or the like of an adhesive subst-ance covering more or less of the area of the sheet.

means designed to facilitate the delivery from the machine and handling of the sheet before the adhesive coating has become dry.

Other objects will appear in connection With the following description.

Figl of the drawings is atop plan view of a gumining machine embodying my in- Avention. i

Fig. 2 is a view in front elevation of the same.

Fig. 3 is a section in elevation of the lefthand end of the machine, as viewed in Figs. l and 2, partly broken away.

Fig. 4 is a vertical section of a machine taken from front to rear on the broken line 4 4 in Fig. 1. j

F ig. 5 is a vertical section taken on the broken line 5-5 in Fig. 4, longitudinally of the conveyer which delivers the gummed sheets from the machine.

Fig. 6 is a View in perspective of one of the sickle-shaped strippers removed from the machine.

Fig. 7 is a view in perspective of one of the side guides removed fromthemacliine.

Fig. 8 is a view in perspective of one of the removable trays `loaded with gummed sheets. Fig. 9 is a view in perspective of a removable tray of modified form.

Referring to the drawingswherein the invention is shown in referred form, l is theframe of the machine having a bed or feed table, 2, leading from the front of the machine to a point adjacent to a guinniing roll, l3, carried by a shaft, 4, rotatively mounted in bearings on the frame-'of the machine.

The lower portion ofthe gumming roll, 3, is adapted to run immersed in a liquid adhesive, 5, which may be glue, mucilage or The invention relates more particularly to Der.

stripper, 14, which' has its lower the like contained in a tank, 6, mounted upon the frame of the machine, as shown in Fig. 4.

An endless belt, 7, is carried by rollers, 8 and 9, with its lower stretch in close proximity to the bed or table, 2, which belt is driven in a direction stretch to feed the blanks over `the surface ofuthe bed or table, Q, toward the gumming ro 3.

One or more sheet-supportingrolls, 10, are also mounted on the shaft, 4, at ditfer ent distances fi'om the gumming roll, 3, to support the portion of the sheet `which is outside the area of the zone to which the adhelslive is to be applied by the lgumming ro 3. y

In rear of the roll, 8, is a roll, l2, in close proximity tothe path of the sheet'of paper `as it passes over the gumming roll, 3.

Above the roll, 12, is another roll, 13, con nected with the roll, l2, by driving belts, 11. `The belt, 7 and the roll, l2, preferably do not engage the gumming roll,-but tend to direct thek sheet through a curved path such that the desired portion of the sheet shall be caused to engage and take ther gum or adh'esive from the gumming roll, 3. .y

AA plurality of belts, 7, may be employed if desired to insure the proper feeding of the sheets. f

Forcei'tain purposes of the invention, the sheets may be fed to and past the gumming roll, 3, by hand or in any other known man- Mounted upon the frame of the machine above the `gumming roll, 3, is a sickle-shaped end, 15, projected downwardly and (forwardly across they path'of a sheet fed through` the machine "and adapted to intercept the gumined sheet and strip the `same from the gummingroll,3.

In advance of the gumming roll, 3, I provide aconveyer, 17, `preferably in the form of an endless belt, the upper stretch of which is movable above and transversely of the path of the sheet as the sheet is fed to the gummingroll, and the lower or return stretch of which extends beneath thebed Or table, 2.

The stripper, 14, is upwardly and retro-V `versely curved to overhang the path of the to cause its said lower sheet in advance of the gumming roll, and preferably also to overhang the upper stretch of the conveyer, 17, as shown in Figs. 3 and 1.

The stripper, 14, thus serves to intercept the gummed sheet, guide the same through a retrovert path, and introvert the sheet to deliver it upsidedown,-that is, with its gummed surface uppermost, in a position in advance of the gumming roll.

The sheet is thus deposited with more or less of its length superimposed upon the upper stretch of the conveyer, 17, or upon a tray. 1S, removably carried by said conveyor.

Then the construction of the machine makes it practicable, the conveyer, 17 is extended laterally approximately to the gumming roll, 3.

In the type of machine shown in the drawings the inner edge of the belt terminates at vsome distance from the gumming roll, and a shelf, 19, is mounted upon the frame of the machine in position to form a slideway to support the ends of the sheets which eX- tend beyond said side of the belt, whereby said ends of the sheet are supported, but permitted free sliding movement as the sheets are carried by the conveyer to one side of the path of the sheet to the gumming mechanism.

As the rear end of the introverted sheet falls upon the roll, 13, said roll serves to help feed the introverted sheet upon the conveycr, 17, or tray, 18.

A plurality of trays, 18, may be employed and placed successively on the upper stretch of the conveyer, 17, the speed of which is such that a plurality of gummed sheets will be deposited upon each tray during the time required for its movement transversely of the path of feed of the sheets to the gumming mechanism.

The sheets will thus be deposited upon the tray in lapping position with their gummed areas uncovered as shown in Fig. S, and as a tray passes beyond the path of said movement of the sheets to the gumming mechanism, the loaded tray can be rel'noved from the conveyer, and placed in a convenient location for permitting the gummed sheets to dry. V

I have shown two strippers, 14, but as many strippers may be employed as are found necessary for the proper inversion and delivery of sheets of the width under treatment.

On opposite sides of the path into which the stripped sheets are directed by the stripper, 14, I mount side guides, Q0, to prevent lateral displacement of the sheets.

The several strippers, 14, are mounted upon the frame of the machine by means of a yoke, 21, provided with slots. 22, slidably engageable with a cross-bar, 23, fixed upon the frame of the machine.

The several guides, 20, are carried by a bracket, 24, also slidably mounted upon the cross-bar, 23.

The strippers, 14, and guides, 20, can t-hus be adjusted to adapt them for the treatment of sheets of different widths.

The tray, 18, may if desired, be formed with an upright edge flange, 1S, to assist in guiding and supporting along one edge, the sheets deposited thereupon.

The trays, 18, may be made of a width to extend more or less beyond the inner side edge of the conveyer, 17, and if desired, they may be so far extended as to malte use of the shelf, 1t), unnecessary.

The end, 1t), of the stripper may be made of flexible material, permitting it to be readily bent by hand to different forms to better adapt it for operation upon sheets of different material and differing in thickness, and flexibility, as indicated in Fig. '1.

rl`he shaft, 4r., has fixed thereon a gear, Q5, in engagement with a pinion, 26, on a shaft, 2T, driven by a pulley, :'28, connected by a belt, 29, with the shaft, 30, of an electric motor, 31.

The endless carrier, 1T. is mounted upon an idle roll, 3Q, and a roll, 33, fixed upon a shaft, 3-1, upon which shaft is also fixed a belt pulley, 35, connected by belt, 3G, with a smaller pulley, 3T, fixed upon a shaft, 23S, which shaft, 38, has tixed thereupon a pulley, 39, connected by a belt, 10, with a smaller pulley, L11, fixed upon a shaft, 42,

A pulley, 43, fixed upon the shaft, 42, is connected by a cross-belt, 44, with a pulley, 45, fixed upon the electric motor shaft, 30.

Guides or gages, L16, may be mounted upon the frame of the machine above the upper stretch of the conveyer, 17, adapted to eugage the outer edges of the tray, 18, and the gunuued sheets deposited thereon.

The stripper, 14, are prefm'ably placed opposite at intervals between the. rolls, and lt).

The operation of the machine is as follows:

A sheet, 17, is placed by hand upon the hed or table, 2, and pushed below the lower stretch of the belt or belts, 7, whereby the sheet moved toward and against the gumming roll, 3, and supporting rolls. 1t). i

rl`he sheet is t-hus brought into eugageuient with the belt or belts` 11, which assists in further feeding the sheet against the surface of the gumming roll until the inner end of the sheet is brought into engagement with the upwardly and retrovcrsely curved stripper, 14, as said end of the i sheet is stripped from the rolls, 3 and 10, bv the forwardly projecting forward end, 15, of the stripper which extends below the path of the sheet in an interval between certain of the rolls, 3 and 10.

As the feed movement of the sheet is conllt) `ing the sheet so that its gummed surface is uppermost.

The introverted sheet falls more or less upon the belt, 7 or a tray, 18, carried by the belt, and it may fall partly upon the belts, 11, which help to feed the sheet well upon the conveyer belt or tray.

The movement of the conveyer belt or tray `is quite slow as compared with the general feed movement of the sheet, so that the conveyer and its tray, 18, during the interval while each sheet is being gummed, introverted and deposited thereupon, moves a distance only slightly greater than the width of the zone to which the adhesive is applied.

The sheets are thus deposited upon the tray, 18, lapping one another, but with their gummed edges uncovered as shown in Fig. 8.

As a loa-ded tray is carried transversely out of the path of the gummed sheets, it is removed from the conveyer belt and placed in a convenient lace to ermitthe adhesive P to dry.

In Figs. 1 and 5, I have shown the machine provided With a second gumming roll, 3, whereby either side edge of the sheet may be gummed as desired.

Vhat I claim asnew and desire to secure by Letters Patent is 1. `In a gumming machine and in combination, a gumming roll in the path of a sheet fed through the machine; a conveyer movable above and transversely of the path of the sheet in advance of the gumming roll; and a stripper in the path of the gummed sheet Vand retroverted to overhang the path of the sheet in advance of the gumming roll above the plane of the conveyer.

2. In a gumming machine and in combination, a gumming roll in the path of a sheet fed through the machine; a conveyer movable above, and transversely of, the path of the sheet in advance of the gumming roll; and a .stripper in the path of the gummed sheet and retroverted to overhang the conveyer.

3. In a gumming machine and in combina-V tion, a gumming roll in the. path of a sheet fed through the machine; yan endless conveyer extending above, below and transversely of, the path of the sheet in advance of the gumming roll; and a stripper inthe path of the gummed sheet and retroverted to overhang the upper stretch ofthe conveyer.

4. In a gumming machine and in combination, a gumming roll in the path of a portion of a sheet fed through the machine; a sheetsupporting roll in the path of another portion of said sheet; a conveyer movable above, and transversely of, the path of the sheet in advance of said rolls; and a stripper in the path of the gummed sheet, one end of the stripper extending between said rolls and its other end being retroverted to'overhang said conveyer. t

5. In a gummingmachine and in combination, a gumming roll in the path of a sheet fed through the machine; a conveyer movable above and transversely ofthe path of the strip in advance of the gumming roll;

and al sickle-shaped stripper in the path of the gummedI sheet with its upper endy retroverted to overhang the conveyer.

6. In a gumming machine and in combination, a gumming roller in the path of a sheet fed throughy the machine; a conveyer movable above and transversely of the path of the sheet in advance of the gumming roll; a stripper in the path of the gummed sheet and retroverted to overhang the path of the sheet in advance of the gumming roll above the plane of the conveyer; and a rearwardly feeding roll beneath the overhanging portion of the stripper between the stripping end of the stripper and the conveyer.

7. In a gumming machine and in combination, a gumming roller in the path of a sheet fed through the machine; a conveyer movable above and transversely of the'path of the plane of the conveyer; and a removable e tray carried by the conveyer.

8. In a gumming machine and in combination, a gumming roller in the path of a sheet fed through the machine; a conveyer mov- 'able` above and transversely yof the path of the sheet in advance of the gumming roll; a stripper in the path of the gummed sheet and retroverted to overhang the path of the sheet in advance of the gumming roll above the plane of thev conveyer; and'aremovable tray carried by the conveyer and projecting therefrom toward the gumming roll.

9. In a gumming machine and in combination, a gumming roll in the path of a sheet fed through the machine; a bed over which the sheet is fed to the gumming roll; a feed belt above said bed 'and cooperative therewith to feed the sheet to the gumming roll;

a feed-roll cooperative with the gumming hang the path of the sheet in advance of the gumming rollV above the plane of the conveyer.

In testimony whereof, I have hereunto set my hand this 1st day of March, 1927.

WILLIAM G. ZEPF. 

